Amazon-optimized shipment splits are MORE EXPENSIVE than Minimal Shipments Splits

What's the point of using Amazon-optimized shipment splits (no placement fee) if the total estimate is slightly more than Minimal Shipments splits?

With Amazon-optimized shipment splits: $274.06 (SPD)

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Minimal Shipments splits (Estimated): $130.36 (LTL) + $108.80 (Placement service fee) = $239.16

For the record, using LTL to ship to the West Coast provides us with the lowest shipping fees but higher Placement Service Fees. Still, this is more cost-effective for us overall than shipping to Central or East, because it is shorter distance.